From: Wu Fengguang <fengguang.wu@intel.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@linux.intel.com>,
"Zheng, Shaohui" <shaohui.zheng@intel.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"y-goto@jp.fujitsu.com" <y-goto@jp.fujitsu.com>,
Dave Hansen <haveblue@us.ibm.com>,
"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1)
Date: Tue, 12 Jan 2010 10:45:52 +0800 [thread overview]
Message-ID: <20100112024552.GA19425@localhost> (raw)
In-Reply-To: <20100112105012.4a210a1c.kamezawa.hiroyu@jp.fujitsu.com>
On Tue, Jan 12, 2010 at 09:50:12AM +0800, KAMEZAWA Hiroyuki wrote:
> Just an information.
>
> We already check kenerke/resource.c's resource information, here.
>
> read_mem()
> -> range_is_allowed()
> -> devmem_is_allowd()
> -> iomem_is_exclusive()
>
> extra calls of page_is_ram() to ask architecture's map seems redundunt.
>
> But, I know PPC guys doesn't use ioresource.c, hehe.
Another exception is !CONFIG_STRICT_DEVMEM, which makes
range_is_allowed()==1. So we still need the page_is_ram() :)
Thanks,
Fengguang
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next prev parent reply other threads:[~2010-01-12 2:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-08 3:32 [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1) Zheng, Shaohui
2010-01-08 5:02 ` H. Peter Anvin
2010-01-08 5:18 ` Zheng, Shaohui
2010-01-08 19:47 ` Andi Kleen
2010-01-12 0:58 ` KAMEZAWA Hiroyuki
2010-01-08 12:48 ` Wu Fengguang
2010-01-11 2:20 ` Zheng, Shaohui
2010-01-11 12:43 ` Wu Fengguang
2010-01-12 0:30 ` KAMEZAWA Hiroyuki
2010-01-12 1:38 ` Andi Kleen
2010-01-12 1:39 ` KAMEZAWA Hiroyuki
2010-01-12 1:50 ` KAMEZAWA Hiroyuki
2010-01-12 2:45 ` Wu Fengguang [this message]
2010-01-12 2:33 ` Wu Fengguang
2010-01-12 2:39 ` KAMEZAWA Hiroyuki
2010-01-12 13:35 ` Wu Fengguang
2010-01-12 23:01 ` Yinghai Lu
2010-01-13 2:29 ` Wu Fengguang
2010-01-12 5:45 ` Zheng, Shaohui
2010-01-12 5:51 ` Zheng, Shaohui
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